What physical property of a star seems to be very important in determining whether or not it has planets?

What physical property of a star, other than its mass or temperature, seems to be very important in determining whether or not it has planets? Please explain, thanks.|||Its heavy element content, sometimes called metallicity.





1st Generation stars have high heavy element content, up to 2%. This means that they were formed from debris expelled from other high-mass stars that have gone supernova, and therefore they will have had an abundant supply of material from which rocky planets can form.





2nd Generation stars have fewer heavy elements, and 3rd Generation stars have none. This does not, however, mean that gas giants cannot form around them.|||I can't quiet remember this but i heard the wobble of a star can be used to determine if a star has planets orbiting around it, because the gravitational pull of the planet will sort of tug the star causing it to wobble.|||If the brightness of the star dims slightly on a regular basis it is usually caused by planets orbiting the star and blocking a small fraction of light that reaches earth.